package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {

    private static final String PAYMENT_UTL="http://localhost:8001/";
   // private static final String PAYMENT_UTL="http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;


    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
       return restTemplate.postForObject(PAYMENT_UTL+"/payment/create",payment,CommonResult.class);
    }

    @GetMapping("consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_UTL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
      ResponseEntity<CommonResult> entity=restTemplate.getForEntity(PAYMENT_UTL+"/payment/get/"+id,CommonResult.class);
      if(entity.getStatusCode().is2xxSuccessful()){
          return entity.getBody();
      }else{
          return new CommonResult<>(444,"操作失败");
      }
    }

    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB(){
      List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
      if(instances == null || instances.size() <= 0){
        return null;
      }
      ServiceInstance serviceInstance = loadBalancer.instances(instances);
      URI uri =  serviceInstance.getUri();
      return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

    @GetMapping(value = "/consumer/payment/zipkin")
    public String paymentZipkin(){
      return restTemplate.getForObject("http://localhost:8001/payment/zipkin",String.class);
    }
}
